Part I

This evening I decided it was time to check out the boot loader and boot command options on the pcDuino. To access the serial port on the J5 debug port I used aSparkfun FTDI Basic Breakout-3.3v — a simple to use logic level serial to USB interface. With the power off and the FTDI Basic disconnected from the computer, I connected the serial lines and ground.

The original source：http://www.the-greathouses.net/blog/category/pcduino/